Perimenopause is the multi-year transition that ends with the final menstrual period (FMP). It typically lasts 5–10 years for most women, though the range stretches from 1 year to over 15 years for outliers. The transition is more predictable than it feels in the middle of it — symptoms tend to emerge in a recognizable order, even if intensity and timing vary widely.
Early perimenopause (typically ages 40–47)
The transition begins with subtle changes to cycle length and flow. Cycles may shorten from 28 to 24 days, lengthen unpredictably, or both within the same year. Heavier bleeding is common as estrogen surges and progesterone deficiencies create unopposed estrogen episodes. Sleep disturbances often start here — middle-of-night waking, harder time falling back asleep. Mood changes, anxiety, and a sense of "something is off" appear before vasomotor symptoms in roughly 30% of women, which is why this stage is so frequently misdiagnosed as anxiety or depression alone.
Late perimenopause (typically ages 47–52)
Cycles become increasingly irregular — gaps of 60+ days are common. Hot flashes and night sweats become the dominant symptoms for most women, peaking in this stage and the first 2 years after the FMP. Brain fog often emerges here, frequently described as "word retrieval problems" or "I walked into a room and forgot why." Heart palpitations, joint pain, and changes in libido also commonly start in late peri. This is the noisiest stage — the one most women associate with "menopause" colloquially.
Early postmenopause (first 5 years post-FMP)
Vasomotor symptoms continue, often peaking in the first 1–2 years after the FMP before gradually declining. Cycles, of course, have stopped. Genitourinary symptoms — vaginal dryness, urinary frequency, recurrent UTIs, painful intercourse — begin to emerge or worsen as local estrogen falls. Bone density loss accelerates: the average postmenopausal woman loses about 1–2% bone mass per year in early postmenopause, which is why DEXA screening becomes important.
Late postmenopause (5+ years post-FMP)
Vasomotor symptoms typically resolve, though approximately 10–15% of women experience persistent hot flashes lasting 10+ years. Genitourinary symptoms tend to worsen, not improve, with time and untreated they are progressive. Bone density loss continues at roughly 0.5–1% per year. Cardiovascular risk converges with male population risk over the decade following FMP, which is why this is the stage where cardio-protective strategies (statins, blood pressure management) move up the priority list.
How to use this map
Knowing roughly where you are makes symptom timing less alarming. A 44-year-old with shortening cycles and middle-of-night waking is on a recognizable arc; a 52-year-old with a 70-day gap and hot flashes is also on a recognizable arc. If your symptoms don't match the typical sequence — for example, severe night sweats at 35 — that's a signal to investigate other causes, not to assume early perimenopause.
Informational only. The Perimenopause Stage Assessor tool offers a personalized estimate.